<template>
  <div class="hello">
    <div>
      我在dev分支上修改了 我是在dve1 上修改的lala
    </div>
  </div>
</template>

<script>
export default {
  name: "HelloWorld",
  props: {
    msg: String,
    str: undefined,
    obj: { name: { b: undefined } }
  },
  mounted() {
    console.log(this.str ?? "34");
    console.log(this.obj?.name?.b);
  }
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="scss"></style>
